HarmonyOS 使用第三方库进行gzip压缩失败

https://gitee.com/openharmony-tpc/openharmony_tpc_samples/tree/master/pakoDemo

HarmonyOS侧调用代码：

let file = fileIo.openSync(uri, fileIo.OpenMode.CREATE);
console.log('AxiosApi','file.name',file.name)
console.log('AxiosApi','cacheDir',this.context.cacheDir + '/' + file.name)
let filePath =  this.context.cacheDir + '/' + 'h5Image.jpg';
// 复制文件到缓存目录下
fileIo.copyFileSync(file.fd, filePath)

try {
  const fil2e = fs.openSync(filePath, fs.OpenMode.READ_WRITE)
  const fd = fil2e?.fd;
  let fileInfo = fs.statSync(fd)
  let arrayBuffer = new ArrayBuffer(fileInfo.size);
  const output = pako.gzip(arrayBuffer,) as Uint8Array;
  let that = new util.Base64Helper();
  let result2 = that.encodeToStringSync(output);
  this.toUploadImageToNet(result2,"2")

} catch (e) {
  console.log(`异常报错${e}`)
}